package com.Jiang.filter;

import com.Jiang.pojo.User;
import com.Jiang.utillity.Constants;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class LoginIntercept implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest req=(HttpServletRequest)servletRequest;
        HttpServletResponse resp=(HttpServletResponse)servletResponse;

        User user=(User)req.getSession().getAttribute(Constants.USER_SESSION);
        if(user==null){
            resp.sendRedirect(req.getContextPath()+"/error.jsp");
        }
        else{
            filterChain.doFilter(servletRequest,servletResponse);
        }
    }

    @Override
    public void destroy() {

    }
}
